Home / 66,438,128.20-99,671,189.10-28,079,897.80

Finding the Fourth Proportional to 66,438,128.20, 99,671,189.10 and 28,079,897.80

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Solution

The fourth proportional to 66,438,128.20, 99,671,189.10 and 28,079,897.80 is: 42,125,762.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438,128.20 : 99,671,189.10 = 28,079,897.80 : x
  2. Step 2: Convert to fraction form
    66,438,128.20/99,671,189.10 = 28,079,897.80/x
  3. Step 3: Cross multiply
    66,438,128.20x = 99,671,189.10 × 28,079,897.80
  4. Step 4: Simplify right side
    66,438,128.20x = 2,798,756,803,532,474
  5. Step 5: Solve for x
    x = 2,798,756,803,532,474/66,438,128.20
  6. Step 6: Final answer
    x = 42,125,762.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.